CPC Subgroup Additional Only
B01D 2239/04 Additives and treatments of the filtering material
Full Title
Aspects relating to filtering material for liquid or gaseous fluids > Additives and treatments of the filtering material
8 direct subcodes
Child Classifications
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- B01D 2239/0407 comprising particulate additives, e.g. adsorbents
- B01D 2239/0414 Surface modifiers, e.g. comprising ion exchange groups
- B01D 2239/0435 Electret
- B01D 2239/0442 Antimicrobial, antibacterial, antifungal additives
- B01D 2239/045 Deodorising additives
- B01D 2239/0457 Specific fire retardant or heat resistant properties
- B01D 2239/0464 Impregnants
- B01D 2239/0471 Surface coating material
Top Applicants
Top 10 applicants by patent filingsfor class B01, 2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 10,345
- CHINESE ACADEMY OF SCIENCES 8,352
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,134
- LG CHEM KR 4,290
- SAUDI ARABIAN OIL COMPANY SA 3,444
- IFPEN (IFP ENERGIES NOUVELLES) FR 3,417
- DOW GLOBAL TECHNOLOGIES US 3,195
- MANN + HUMMEL DE 2,822
- JOHNSON MATTHEY GB 2,802
- UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 2,737